Underscore nested pluck mixin. Takes an array as the first argument and any number of keys as additional arguments. E.g.: _.nestedPluck(arr, 'person', 'name', 'first');

Nested pluck mixin

_.mixin({
  nestedPluck: function nestedPluck(arr) {
      var plucks = _.rest(arguments);
      if (plucks.length > 0) {
          var a = _.flatten(_.pluck(arr, plucks.shift()), true);
          return nestedPluck.apply(null, [a].concat(plucks));
      }
      return arr;
  }
});